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a7e0fb6c20
linux/arch/powerpc/platforms
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Michael Ellerman a7e0fb6c20 powerpc/powernv: Fix opal_exit tracepoint opcode 
Currently the opal_exit tracepoint usually shows the opcode as 0:

  <idle>-0     [047] d.h.   635.654292: opal_entry: opcode=63
  <idle>-0     [047] d.h.   635.654296: opal_exit: opcode=0 retval=0
  kopald-1209  [019] d...   636.420943: opal_entry: opcode=10
  kopald-1209  [019] d...   636.420959: opal_exit: opcode=0 retval=0

This is because we incorrectly load the opcode into r0 before calling
__trace_opal_exit(), whereas it expects the opcode in r3 (first function
parameter). In fact we are leaving the retval in r3, so opcode and
retval will always show the same value.

Instead load the opcode into r3, resulting in:

  <idle>-0     [040] d.h.   636.618625: opal_entry: opcode=63
  <idle>-0     [040] d.h.   636.618627: opal_exit: opcode=63 retval=0

Fixes: c49f63530b ("powernv: Add OPAL tracepoints")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-02-10 13:40:22 +11:00
..
8xx powerpc/8xx: Implement support of hugepages 2016-12-09 22:49:07 -06:00
40x powerpc updates for 4.10 2016-12-16 09:26:42 -08:00
44x powerpc updates for 4.10 2016-12-16 09:26:42 -08:00
52xx powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
82xx powerpc/e8248e: Select PHYLIB only if NETDEVICES is enabled 2016-09-24 23:59:47 -05:00
83xx powerpc/83xx/suspend: use builtin_platform_driver 2016-12-04 19:51:27 -06:00
85xx powerpc: fsl/fman: remove fsl,fman from of_device_ids[] 2016-12-20 13:55:34 -05:00
86xx powerpc: Convert fsl_rstcr_restart to a reset handler 2016-09-25 02:38:50 -05:00
512x powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
amigaone
cell Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
chrp Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
embedded6xx powerpc: Add support for relative exception tables 2016-11-14 11:11:51 +11:00
maple powerpc: Move isa bridge definitions to separate include 2017-01-31 13:54:17 +11:00
pasemi powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
powermac i2c_powermac: shut up lockdep warning 2016-11-14 11:11:51 +11:00
powernv powerpc/powernv: Fix opal_exit tracepoint opcode 2017-02-10 13:40:22 +11:00
ps3 powerpc: Change places using CONFIG_KEXEC to use CONFIG_KEXEC_CORE instead. 2016-11-30 23:15:11 +11:00
pseries powerpc/pseries: Add support for hash table resizing 2017-02-10 13:27:55 +11:00
fsl_uli1575.c
Kconfig powerpc/pseries: Move ibmebus.c into platforms pseries 2016-11-18 23:02:18 +11:00
Kconfig.cputype powerpc/8xx: Implement support of hugepages 2016-12-09 22:49:07 -06:00
Makefile